Crushing and grinding mill



Feb. 13, 1923. 1,444,991 0. WAUTHIER CRUSHING AND GRINDING MILL- Au 17, 1921 2 sheets-sheet l Filed Feb. 13, 1923.

o. WAUTHIER CRUSHING AND GRINDING MILL Patented Feb.- 13, 1923.

UNITED STATES PATENT OFFICE.

. OSCAR 'WAUTHIER, OF BRUSSELS, BELGIIl'iM.

CRUSHING AND GRINDING MILL.

Application filed August 17, 1921. Serial 110,493,102.

To all 207mm if may concern- Be it known that I, Oscar 'Av'rHmn. a subject of the King of the Belgians, residing at Brussels. Belgium, 131 AvenueAlbert. have invented certain Improved Crushing and Grinding Mills (for which I have filed applications in Belgium N 265,449 dated 26th February 1914: (arermany N 325,029, dated 11th April 1917; Russia dated 27th March 1911; Great Britain 1 13878 dated 8th June 1911; Portugal N 9167, dated 24th March .1914; Austria N" 82628, dated 23rd March 1914. and Hungary dated 24th March 1914:), of which the following is a specification.

The presentinvention relates to improvements in crushing, breaking or grinding machines, for the pulverization of minerals and has for its object to increase the efficiency of the machine, to lengthen its life. and to avoid the breakage of the pulverizing members when substances of too great hardness are passed through the machine. This result is obtained by means of hard steel cylinders or rollers, hinged ol'pivoted be tween the discs of a drum, and projected towards the outer casing of the machine when the drum is rotated, by the centrifugal force. The rollers are able to rotate freely about their axis. The rollers are also free to move radially; their bearing pins being arranged in radial slots in the discs. The arrangement is such, that when a hard substance ofi'ers too great a resistance to breakage, the rollers will yield sufficiently to allow the substance to pass, and no damage to the machine results.

The above mentioned objects are attained by means of the mechanism illustrated in the. accompanying drawings, in which:

Fig. 1 is a longitudinal section of the crushing or grinding machine;

.Fig. 2 is a section on the line CD of Fig. 1;

Fig. 3 is a section on the line A--B of Fig. 1

F igft is a view in elevation of one of the rollers or cylinders of the crushing or grinding machine.

The machine consists of a hard cast-iron casing entirely armour plated on the inside and preferably constructed in two parts of which the upper part A forms a can or cover and the lower part B forms the body and rests on the concrete foundations. The two parts of the casing are connected together preferably by means of a double'hinge joint Q having removable pins and a packin C011, s sting' of a stripof-felt D (Fig. 2) tting into a groove or recess in the lower part may be provided between the twoparts of the casing to prevent the leakagev of any dust. A leather joint E (Fig. 1) is provided at each of the points F where the shaft passes through the casing; these joints also serve to prevent the outlet of any dust. The

hinging of the two parts of the casing allows easy access to the interior of the machine as the upper part or cap may be lifted by re moving either one of the removable hinge pins, and swinging back the cap'or cover about the other hinge; a lifting tackle can be a used for this purpose and can be attached to one of the rings fixed to the cap. i

The lower part of the casing carries the main shaft which is supported in two large surface bearings, provided with bushings or steps of anti-friction metal and automatic ring lubrication. The shaft conveniently rotates at a speed of about 400 to 1000 revolutions per minute and is driven by means of a. belt and pulley; the pulley being keyed on to one end of the shaft.

Upon the main shaft are fixed twoor more hard steel discs G, G, G G each of which has a series of slots 1', 1", 1' (Fig. 2)

round its circumference extending radially from a point at some distance from the centre and having their open ends at the periphery of the discs. In these slots are fitted the bearing pins of the steel crushing rollers 1, 2. 3, etc. shown in detail in Fig. 4. The rollers 1, 2, 3, etc. are thus supported between the discs and are free both to rotate and to move radially towards or away from the centre of the discs; the rollers are not fitted regularly in the compartments formed between the discs, but are arranged alternatively or in staggered formation, from the first space or compartment H between the a discs towards the last compartment H (in of their ends and are. spaced at intervals round the circumference. They are forced stead to be transversely straight and parallel to the main shaft they are transversely inclined between two discs from one disc to the next or arranged diagonally between the discs in the transverse direction) so that the crushed material is circulated between the cylinders and at the same time is passed from the first compartment between two discs to the next, from the second to the third, and so on. In connection with the above described machine, a fan V driven a belt and pulley from the main shaft of the crushing machine, will preferably be provided and will be suitably arranged to blow the crushed material through a grate or meshwork S (of perforated sheet iron for instance),allowing the powder in its final state to be collected at the other side of the grate, while the residuewhich will not pass through the grate is collected and again put into the hopper K of the machine to go through the process again.

All the armour plates a are removable and the subdivision of the plates is such that only one man is required to dismantle, remove or replace any one of them.

The machine, as described, is suitable for crushing minerals of all kinds and of all degrees of hardness, suchas pyrites, limestone, emeri-stone, sand-stone, porphyry, slag, phosphates, superphosphates, ochres, flint, glass, uartz, coal, etc. one, 2, 3 ormore compartments and discs, can be used according to the. degree of fineness towhich the material is required to be crushed; the steel rollers may be of dimensions and weight suited to the speed at which the machine is to be rotated and the output to 'be obtained. The output of the machine is large,

and only a comparatively small amount of power is required to drive it; the floor space occupied by the machine is not extensive.

Further, the amount of wear suffered by the working parts is small in proportion to the large output of the machine.

I claim:

1. In a crushing or grinding machine for pulverizing minerals, the combination of:

a casing with a rotatable shaft journaled therein; a plurality of metal discs of equal diameter, keyed on the rotary shaft to form a plurality of v compartments within said casing and having each a plurality of radial slots at intervals in their periphery; a circumferential armour-plate lining for said compartments, formed of a number of sections; a plurality of cylindrical metal rollers in each compartment, having integral axial bearing-pins movably maintained in the radial slots of the adjacent discs, the rollers of each compartment alternating circumferentially with those of the adjacent compartments; and means for causing the materials treated in one compartment to pass to the next,consisting of a pluralityof blades secured at intervals to the periphery of aforesaid discs and extending across the length of the compartments transversely to said discs and diagonally in relation to the projection of the longitudinal axis of the rotary shaft; substantially as described.

2-. n a crushing or grinding machine for pulverizing minerals, the combination of: a casing with a rotatable shaft journaled therein; a plurality of metal discs of equal diameter, keyed on the rotary shaft to form a plurality of compartments within said casing and having each a plurality of radial slots at intervals in their periphery; a circumferential armour-plate lining for said compartments, formed. of a number of sections; a lurality of cylindrical metal rollers in each compartment arranged parallel to the rotary shaft between the adjacent discs, alternating circumferentially with those of the adjacent compartments and having at their ends integral axial bearing-pins movably maintained in the radial slots of said discs, andmeans for causing the materials treated in one compartmentto pass to the next,consisting of a. plurality of blades secured at intervals to the periphery of aforesaid discs and extending across the length of the compartments transversely to said discs and diagonally in relation to the projection of the longitudinal axis of the rotary shaft.

In testimony thereof I signed hereunto my name in the presence of two subscribing witnesses.

OSCAR WAUTHIER. Witnesses:

Y. Y. ZALEANY, R. C. HOUOK. 

